Business Details
42 Years
experience
Emergency
services
Trusted Boiler Installations in Hertfordshire
AOS Heating has been a trusted name in the heating and boiler industry for over 38 years, established in 1984 as a family-run business. Our reputation is built on outstanding customer service, honest advice, and reliable solutions for central heating, electrical, and plumbing needs. We specialise in renewable technologies, including energy-efficient boilers and air source heat pumps, ensuring tailored solutions for every client. Our team of Safe Gas-accredited engineers delivers expert installations, repairs, and servicing, supported by public liability insurance and rigorous staff training.With a commitment to transparency, communication, and continuous improvement, we prioritise customer satisfaction, evidenced by decades of repeat business and referrals. Our dedication to quality is reflected in manufacturer partnerships, extended guarantees, and adherence to industry standards like BS 7593 for chemical powerflushing.
Services
Boiler Installation
Central Heating
Powerflushing
Air Source Heat Pumps
Electrical Services
Boiler Servicing
Drainage Cover
Emergency Repairs
Service Cover Plans
Gas Certificates
Details
- Year established: 1984
Highlights and features
- 38 years of experience in heating and boiler installations
- Safe Gas-accredited engineers with ongoing technical training
- Public liability insurance up to 5 million
- Specialists in renewable and energy-efficient heating technologies
- Customer-first approach with 24/7 emergency service availability
Associations and certifications
- Gas Safe Register
- Worcester Bosch Accredited Installer
- Ideal Accredited Installer
- RECC Member
What people say
Polite, efficient engineers
Ten out of ten service
Punctual and professional
Excellent workmanship
Highly recommend
Services
Boiler Installation
We provide expert boiler installations tailored to your home's requirements. Our Gas Safe-accredited engineers conduct full site surveys before installation, ensuring optimal system selection and compatibility. All installations include a 5-year warranty, manufacturer documentation, and post-installation feedback to guarantee satisfaction and long-term reliability.
Central Heating
Our central heating solutions combine efficiency and comfort. Engineers perform comprehensive property assessments to recommend systems matching your needs. Services include radiator installation, thermostatic controls, and chemical powerflushing to enhance system longevity and energy efficiency while meeting British Standard 7593 requirements.
Powerflushing
Chemical powerflushing removes sludge and debris from heating systems. Using Sentinel and MagnaClean technology, we restore system efficiency, reduce noise, and lower energy bills by 15-30%. Mandatory for new boiler installations, this process extends system lifespan and prevents breakdowns.
Air Source Heat Pumps
We install Mitsubishi Electric Ecodan air source heat pumps for off-grid properties. Our specialists handle complete system design, including radiators, thermostatic valves, and hot water cylinders. These energy-efficient systems reduce carbon footprints while maintaining optimal home comfort through advanced heat exchange technology.
Electrical Services
Our qualified engineers provide electrical fault finding, rewiring, and safety testing. Services include fuse box upgrades, lighting installations, and CCTV surveys. All work complies with current regulations, ensuring safe, reliable electrical systems integrated with your heating infrastructure.
Questions
Do you offer emergency boiler repair services?
Yes, we provide 24/7 emergency boiler repair services across Hertfordshire and surrounding areas with a typical response time of 1 hour during working hours.
What boiler brands do you install?
We specialise in Worcester Bosch and Ideal boilers, offering extended guarantees up to 10 years for installations completed by our Gas Safe-accredited engineers.
Can I spread payments for a new boiler?
Yes, we offer interest-free finance options to spread payments over 3, 6, 9, or 12 months for boiler installations and major heating system upgrades.
Do you service all boiler types?
Our engineers service all major boiler brands and models, including gas, oil, and LPG systems, with annual servicing recommended to maintain efficiency and warranty validity.
What areas do you cover?
We operate throughout Hertfordshire, Essex, Buckinghamshire, and North London, providing heating installations, repairs, and maintenance services to residential and commercial clients.
Are your engineers certified?
All our engineers hold Safe Gas accreditation and undergo continuous training at our in-house facility to maintain expertise in the latest heating technologies and installation methods.
Reviews (5)
Kevin Crooks
Jan 21, 2022
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Update after 2 years: Still one of the best companies I've used, I've had many positive experiences with AOS and highly recommend! After having a few problems with our system, they were extremely easy to contact, diagnosed the problem and fixed for us. AOS is an Excellent company, with great after-sales support. My thanks in particular to Josie in the services dept and to Jack for fixing the problem. Great quality work fitting an air source heat pump for us - they kept us informed and updated through the process, and the installers were very friendly. I'd definitely recommend!
Adrian Walter
Jul 19, 2021
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Positive:Professionalism,Punctuality,Quality,Responsiveness,Value
Excellent service from first enquiry to post installation paperwork. Installation crew were superb - courteous, efficient, tidy and punctual.
Questions were answered quickly and patiently and price was reasonable. All in all, a very positive experience so I can't ask for anything more!
Service:Install heating system
Excellent service from first enquiry to post installation paperwork. Installation crew were superb - courteous, efficient, tidy and punctual.
Questions were answered quickly and patiently and price was reasonable. All in all, a very positive experience so I can't ask for anything more!
Service:Install heating system
Rebecca Kinsley
Jul 14, 2021
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We use AOS for absolutely all of our heating/plumbing needs. We are currently renovating our house, and due to us having to move various radiators, and needing to box in certain pipes, we have found that we sometimes need a heating engineer to make slight adjustments for us, so that the plasterer can do what he needs to do when skimming over boxing etc. We have also had various accidents where we bent our own pipes, or a tradesman went and drilled into a pipe by mistake. The answer? AOS every time. Even when they really can't fit us in, I somehow manage to wangle myself a last minute slot. Honestly
Andy Muir
Jun 08, 2021
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Positive:Professionalism,Punctuality,Quality,Responsiveness,Value
AOS replaced our old ducted warm air heating system with a new Boiler/radiator system. A very tidy job. Engineers and office staff provided an exceptional service. Highly recommended.
Service:Install heating system
AOS replaced our old ducted warm air heating system with a new Boiler/radiator system. A very tidy job. Engineers and office staff provided an exceptional service. Highly recommended.
Service:Install heating system
Tony Coe
Apr 17, 2021
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We were introduced to AOS Energy Efficient Heating Systems Limited by a previous satisfied customer of theirs. We needed to replace an oil-fired CH boiler which was over 40 years old and the idea of going fully electric was very attractive, especially with the Government's green incentives and the fact that with a heat pump you get out more than you put in. We made enquiries of several friends and neighbours who had used AOS to make similar conversions, and they were all enthusiastic. "Very clean and tidy", "extremely good plumbers" were typical comments. We found AOS's approach to be very open
